1 sf: Challenge & Extension
Mathematics
Year 9
15 questions
~30 mins
1 views0 downloads
About This Worksheet
A worksheet designed to challenge Year 9 students on understanding and applying rounding to 1 significant figure, including real-world and extension problems.
Worksheet Preview
Full preview • 15 questions
1 sf: Challenge & Extension
Subject: MathematicsGrade: Year 9
Name:
Date:
TeachWhizzTeachWhizzTeachWhizzTeachWhizzTeachWhizzTeachWhizzTeachWhizzTeachWhizzTeachWhizzTeachWhizzTeachWhizzTeachWhizzTeachWhizzTeachWhizzTeachWhizzTeachWhizzTeachWhizzTeachWhizzTeachWhizzTeachWhizzTeachWhizzTeachWhizzTeachWhizzTeachWhizzTeachWhizzTeachWhizzTeachWhizzTeachWhizzTeachWhizzTeachWhizzTeachWhizzTeachWhizzTeachWhizzTeachWhizzTeachWhizzTeachWhizzTeachWhizzTeachWhizzTeachWhizzTeachWhizz
Untitled Worksheet
Grade Year 9
A
Introduction
Read the key concept below before attempting the questions.
1.
Rounding to 1 significant figure involves identifying the first non-zero digit and rounding the number to that digit. For example, 0.0456 rounded to 1 sf is 0.05.
[2 marks]B
Fluency & Practice
Answer all questions. Show your working in the grid spaces provided.
1.
Round 7,890 to 1 significant figure.
[1 mark]2.
Round 0.004567 to 1 significant figure.
[1 mark]3.
Round 123.456 to 1 significant figure.
[1 mark]4.
Round 56.78 to 1 significant figure.
[1 mark]C
Targeted Practice
Answer the following questions that involve more complex calculations and reasoning.
1.
A scientist measures a sample weight of 0.00789 kg. Round this to 1 significant figure for reporting.
[2 marks]2.
A building project estimates the cost as £124,000. Round this to 1 significant figure for an approximation.
[2 marks]3.
In a physics experiment, the speed is recorded as 299,792,458 m/s. Round to 1 significant figure.
[2 marks]4.
A bank account balance shows $45,678. Round to 1 significant figure for a rough estimate.
[2 marks]D
Real-world Applications
Solve these contextual word problems involving rounding to 1 significant figure.
1.
A car travels approximately 12,345 km in a year. Round this distance to 1 significant figure to estimate the travel distance.
[3 marks]2.
An athlete's height is 1.987 meters. Round to 1 significant figure for a quick reference.
[2 marks]E
Challenge & Extension
Attempt these challenging questions that require multi-step reasoning and application.
1.
A company reports a revenue of $3,456,789. Round to 1 significant figure and explain why this is useful for quick comparisons.
[4 marks]2.
Estimate the total number of stars in the galaxy as 100,000,000,000. Round to 1 significant figure and justify your estimate.
[3 marks]F
Mixed Review & Error Analysis
Answer the following questions, including identifying common mistakes and correcting them.
1.
A student rounds 0.05678 to 1 significant figure as 0.06. Is this correct? Explain your answer.
[3 marks]2.
The number 9876 is rounded to 1 sf as 10000. Is this accurate? Why or why not?
[3 marks]Quick Actions
What is Remix?
Create a new worksheet based on this one. Change the grade level, topic, number of questions, or difficulty - then generate a fresh version.
- • Change grade level (Grade 6 → Grade 7)
- • Swap topics (Harry Potter → Macbeth)
- • Add more questions (10 → 15)
- • Adjust difficulty
Details
- Created
- 1/1/2026
- Updated
- 1/1/2026
- Type
- worksheet